Why is my phone charging slowly?

I've tried like 5 chargers and nothing changed, it still charge slowly, including the charger that the phone came with. But connecting it to PC will let it charge the normal way. Please help me out, it's really ******* me up. I'm on the latest build of creators update (not insider) and the phone is Lumia 640 XL

OK, but hwat I understand you are using several chargers and it's not charging the as it should, but if you plug it to the USB port on a PC it's charging as fast as it suppose to do it, in that case it could be a problem in the software side, maybe it's only matter of an app waiting feedback from the USB.

Let me try to explain it, if you have some app activated when the USB port is connected and it's not receiving any signal from the USB (like when it's a regular charger which only sends power using 2 of the 4 pins of the USB plug) it can limit the amount of current received for the charger.

Most of the apps which can cause that are "Optimizers", also some antivirus and cleaners could do that as what they call "overcharge protection".